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Struts example source code file (ExceptionHolder.java)

This example Struts source code file (ExceptionHolder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Struts tags/keywords

exception, exception, exceptionholder, io, ioexception, printwriter, printwriter, serializable, string, string, stringwriter, stringwriter

The Struts ExceptionHolder.java source code

/*
 * Copyright 2002-2007,2009 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.opensymphony.xwork2.interceptor;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Serializable;

/**
 * <!-- START SNIPPET: javadoc -->
 *
 * A simple wrapper around an exception, providing an easy way to print out the stack trace of the exception as well as
 * a way to get a handle on the exception itself.
 *
 * <!-- END SNIPPET: javadoc -->
 *
 * @author Matthew E. Porter (matthew dot porter at metissian dot com)
 */
public class ExceptionHolder implements Serializable {

    private Exception exception;

    /**
     * Holds the given exception
     *
     * @param exception  the exception to hold.
     */
    public ExceptionHolder(Exception exception) {
        this.exception = exception;
    }

    /**
     * Gets the holded exception
     *
     * @return  the holded exception
     */
    public Exception getException() {
        return this.exception;
    }

    /**
     * Gets the holded exception stacktrace using {@link Exception#printStackTrace()}.
     *
     * @return  stacktrace
     */
    public String getExceptionStack() {
        String exceptionStack = null;

        if (getException() != null) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);

            try {
                getException().printStackTrace(pw);
                exceptionStack = sw.toString();
            }
            finally {
                try {
                    sw.close();
                    pw.close();
                } catch (IOException e) {
                    // ignore
                }
            }
        }

        return exceptionStack;
    }
    
}

Other Struts examples (source code examples)

Here is a short list of links related to this Struts ExceptionHolder.java source code file:

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